| abstract |
An organic electroluminescence device having RGB pixel areas, wherein optical compensation layers ( 10, 11 ) are respectively arranged between the red light emitting layer ( 4 ) and the first organic functional layer ( 12 ) as well as between the green light emitting layer ( 5 ) and the first organic functional layer ( 12 ), the optical compensation layers ( 10, 11 ) are made of a first hole transport material and a second hole transport material, the first hole transport material has a triplet-state energy level≧2.48 eV and a HOMO energy level≦−5.5 eV, the second hole transport material has a HOMO energy level≧−5.5 eV, and the difference between the HOMO energy level of the first hole transport material and the HOMO energy level of the second hole transport material is ≦0.2 eV. Its preparation process is simple, and it can significantly reduce power consumption of the light-emitting device so as to increase light-emitting efficiency. |